From: hmurata <hmurata>
Date: Sun, 6 Jan 2002 10:46:18 +0000 (+0000)
Subject: * elmo.el (elmo-folder-search): Defined. Fixed docstring.
X-Git-Tag: wl-2_9_5~31
X-Git-Url: http://git.chise.org/gitweb/?a=commitdiff_plain;h=3823cb47f19c37a739371e84d76f051cdcc365bd;p=elisp%2Fwanderlust.git

* elmo.el (elmo-folder-search): Defined. Fixed docstring.
(elmo-message-match-condition): New method.
(elmo-folder-search-fast): New inline function.
(elmo-msgdb-search): Removed.

* elmo-filter.el (elmo-folder-msgdb-create): Create from msgdb of
target folder if it is unplugged.
(elmo-folder-list-messages-internal): Return t if target folder is
unplugged and itself is persistent; In this case, use list be
searched already.

* elmo-msgdb.el (elmo-msgdb-search-internal): Removed.
(elmo-msgdb-search-internal-primitive): Ditto.
(elmo-msgdb-match-condition): New function.
(elmo-msgdb-match-condition-primitive): Ditto.

* elmo-util.el (elmo-filter-condition-p): New macro.

* elmo-cache.el (elmo-folder-search): Removed.

* elmo-localdir.el (elmo-folder-search): Ditto.

* elmo-maildir.el (elmo-folder-search): Ditto.

* elmo-mark.el (elmo-folder-search): Ditto.

* elmo-nmz.el (elmo-folder-search): Ditto.

* elmo-sendlog.el (elmo-folder-search): Ditto.

* elmo-shimbun.el (elmo-folder-search): Ditto.

* elmo-imap4.el (elmo-folder-search): Call method of parent class
if folder is unplugged.

* elmo-nntp.el (elmo-folder-search): Likewise.
(elmo-nntp-search-internal): New function.
---

diff --git a/elmo/ChangeLog b/elmo/ChangeLog
index 4b24448..95edb0f 100644
--- a/elmo/ChangeLog
+++ b/elmo/ChangeLog
@@ -1,5 +1,43 @@
 2002-01-06  Hiroya Murata  <lapis-lazuli@pop06.odn.ne.jp>
 
+	* elmo.el (elmo-folder-search): Defined. Fixed docstring.
+	(elmo-message-match-condition): New method.
+	(elmo-folder-search-fast): New inline function.
+	(elmo-msgdb-search): Removed.
+
+	* elmo-filter.el (elmo-folder-msgdb-create): Create from msgdb of
+	target folder if it is unplugged.
+	(elmo-folder-list-messages-internal): Return t if target folder is
+	unplugged and itself is persistent; In this case, use list be
+	searched already.
+
+	* elmo-msgdb.el (elmo-msgdb-search-internal): Removed.
+	(elmo-msgdb-search-internal-primitive): Ditto.
+	(elmo-msgdb-match-condition): New function.
+	(elmo-msgdb-match-condition-primitive): Ditto.
+
+	* elmo-util.el (elmo-filter-condition-p): New macro.
+
+	* elmo-cache.el (elmo-folder-search): Removed.
+
+	* elmo-localdir.el (elmo-folder-search): Ditto.
+
+	* elmo-maildir.el (elmo-folder-search): Ditto.
+
+	* elmo-mark.el (elmo-folder-search): Ditto.
+
+	* elmo-nmz.el (elmo-folder-search): Ditto.
+
+	* elmo-sendlog.el (elmo-folder-search): Ditto.
+
+	* elmo-shimbun.el (elmo-folder-search): Ditto.
+
+	* elmo-imap4.el (elmo-folder-search): Call method of parent class
+	if folder is unplugged.
+
+	* elmo-nntp.el (elmo-folder-search): Likewise.
+	(elmo-nntp-search-internal): New function.
+
 	* elmo-version.el (elmo-version): Up to 2.9.3.
 
 2001-12-27  Hiroya Murata  <lapis-lazuli@pop06.odn.ne.jp>
diff --git a/elmo/elmo-cache.el b/elmo/elmo-cache.el
index 2824f85..b13248b 100644
--- a/elmo/elmo-cache.el
+++ b/elmo/elmo-cache.el
@@ -174,29 +174,6 @@
 (luna-define-method elmo-folder-exists-p ((folder elmo-cache-folder))
   t)
 
-(luna-define-method elmo-folder-search ((folder elmo-cache-folder)
-					condition &optional from-msgs)
-  (let* ((msgs (or from-msgs (elmo-folder-list-messages folder)))
-	 (number-list msgs)
-	 (i 0)
-	 (num (length msgs))
-	 file
-	 matched
-	 case-fold-search)
-    (while msgs
-      (if (and (setq file (elmo-message-file-name folder (car msgs)))
-	       (file-exists-p file)
-	       (elmo-file-field-condition-match file
-						condition
-						(car msgs)
-						number-list))
-	  (setq matched (nconc matched (list (car msgs)))))
-      (elmo-display-progress
-       'elmo-internal-folder-search "Searching..."
-       (/ (* (setq i (1+ i)) 100) num))
-      (setq msgs (cdr msgs)))
-    matched))
-
 (luna-define-method elmo-message-file-p ((folder elmo-cache-folder) number)
   t)
 
diff --git a/elmo/elmo-filter.el b/elmo/elmo-filter.el
index abaf702..3a29327 100644
--- a/elmo/elmo-filter.el
+++ b/elmo/elmo-filter.el
@@ -87,11 +87,48 @@
 					      numlist new-mark already-mark
 					      seen-mark important-mark
 					      seen-list)
-  (elmo-folder-msgdb-create (elmo-filter-folder-target-internal folder)
-			    numlist
-			    new-mark
-			    already-mark
-			    seen-mark important-mark seen-list))
+  (let ((target-folder (elmo-filter-folder-target-internal folder)))
+    (if (elmo-folder-plugged-p target-folder)
+	(elmo-folder-msgdb-create target-folder
+				  numlist
+				  new-mark
+				  already-mark
+				  seen-mark important-mark seen-list)
+      ;; Copy from msgdb of target folder if it is unplugged.
+      (let ((len (length numlist))
+	    (msgdb (elmo-folder-msgdb target-folder))
+	    overview number-alist mark-alist
+	    message-id seen gmark)
+	(when (> len elmo-display-progress-threshold)
+	  (elmo-progress-set 'elmo-folder-msgdb-create
+			     len "Creating msgdb..."))
+	(unwind-protect
+	    (dolist (number numlist)
+	      (let ((entity (elmo-msgdb-overview-get-entity number msgdb)))
+		(when entity
+		  (setq entity (elmo-msgdb-copy-overview-entity entity)
+			overview (elmo-msgdb-append-element overview entity)
+			message-id (elmo-msgdb-overview-entity-get-id entity)
+			number-alist (elmo-msgdb-number-add number-alist
+							    number
+							    message-id)
+			seen (member message-id seen-list))
+		  (if (setq gmark (or (elmo-msgdb-global-mark-get message-id)
+				      (if (elmo-file-cache-exists-p message-id)
+					  (if seen
+					      nil
+					    already-mark)
+					(if seen
+					    nil ;;seen-mark
+					  new-mark))))
+		      (setq mark-alist
+			    (elmo-msgdb-mark-append
+			     mark-alist
+			     number
+			     gmark)))))
+	      (elmo-progress-notify 'elmo-folder-msgdb-create))
+	  (elmo-progress-clear 'elmo-folder-msgdb-create))
+	(list overview number-alist mark-alist)))))
 
 (luna-define-method elmo-folder-append-buffer ((folder elmo-filter-folder)
 					       unread &optional number)
@@ -113,8 +150,15 @@
 
 (luna-define-method elmo-folder-list-messages-internal
   ((folder elmo-filter-folder) &optional nohide)
-  (elmo-folder-search (elmo-filter-folder-target-internal folder)
-		      (elmo-filter-folder-condition-internal folder)))
+  (let ((target (elmo-filter-folder-target-internal folder)))
+    (if (or (elmo-folder-plugged-p target)
+	    (not (elmo-folder-persistent-p folder)))
+	;; search target folder
+	(elmo-folder-search
+	 target
+	 (elmo-filter-folder-condition-internal folder))
+      ;; not available
+      t)))
 
 (defsubst elmo-filter-folder-list-unreads-internal (folder unread-marks
 							   mark-alist)
diff --git a/elmo/elmo-imap4.el b/elmo/elmo-imap4.el
index c9ae6e2..355b111 100644
--- a/elmo/elmo-imap4.el
+++ b/elmo/elmo-imap4.el
@@ -2205,14 +2205,16 @@ If optional argument REMOVE is non-nil, remove FLAG."
 			    folder session (nth 2 condition) from-msgs)))
 	    result (sort result '<))))))
 
-(luna-define-method elmo-folder-search ((folder elmo-imap4-folder)
-					condition &optional numbers)
-  (save-excursion
-    (let ((session (elmo-imap4-get-session folder)))
-      (elmo-imap4-session-select-mailbox
-       session
-       (elmo-imap4-folder-mailbox-internal folder))
-      (elmo-imap4-search-internal folder session condition numbers))))
+(luna-define-method elmo-folder-search :around ((folder elmo-imap4-folder)
+						condition &optional numbers)
+  (if (elmo-folder-plugged-p folder)
+      (save-excursion
+	(let ((session (elmo-imap4-get-session folder)))
+	  (elmo-imap4-session-select-mailbox
+	   session
+	   (elmo-imap4-folder-mailbox-internal folder))
+	  (elmo-imap4-search-internal folder session condition numbers)))
+    (luna-call-next-method)))
 
 (luna-define-method elmo-folder-msgdb-create-plugged
   ((folder elmo-imap4-folder) numbers &rest args)
diff --git a/elmo/elmo-localdir.el b/elmo/elmo-localdir.el
index b1f9ef9..f9e5c2f 100644
--- a/elmo/elmo-localdir.el
+++ b/elmo/elmo-localdir.el
@@ -323,46 +323,6 @@
 		     (elmo-localdir-folder-directory-internal folder))
    condition number number-list))
 
-(luna-define-method elmo-folder-search ((folder elmo-localdir-folder)
-					condition &optional numbers)
-  (let* ((msgs (or numbers (elmo-folder-list-messages folder)))
-	 (num (length msgs))
-	 (i 0)
-	 last cur number-list case-fold-search ret-val)
-    (cond
-     ;; short cut.
-     ((and (vectorp condition)
-	   (not (eq (elmo-filter-type condition) 'unmatch))
-	   (string= (elmo-filter-key condition) "last"))
-      (nthcdr (max (- (length msgs)
-		      (string-to-int (elmo-filter-value condition)))
-		   0)
-	      msgs))
-     ((and (vectorp condition)
-	   (not (eq (elmo-filter-type condition) 'unmatch))
-	   (string= (elmo-filter-key condition) "first"))
-      (let ((rest (nthcdr (string-to-int (elmo-filter-value condition) )
-			  msgs)))
-	(mapcar '(lambda (x)
-		   (delete x msgs)) rest))
-      msgs)
-     (t
-      (setq number-list msgs)
-      (while msgs
-	(if (elmo-localdir-field-condition-match folder condition
-						 (car msgs) number-list)
-	    (setq ret-val (cons (car msgs) ret-val)))
-	(when (> num elmo-display-progress-threshold)
-	  (setq i (1+ i))
-	  (setq cur (/ (* i 100) num))
-	  (unless (eq cur last)
-	    (elmo-display-progress
-	     'elmo-localdir-search "Searching..."
-	     cur)
-	    (setq last cur)))
-	(setq msgs (cdr msgs)))
-      (nreverse ret-val)))))
-
 (luna-define-method elmo-folder-pack-numbers ((folder elmo-localdir-folder))
   (let* ((dir (elmo-localdir-folder-directory-internal folder))
 	 (msgdb (elmo-folder-msgdb folder))
diff --git a/elmo/elmo-maildir.el b/elmo/elmo-maildir.el
index ab3bf6a..0a91115 100644
--- a/elmo/elmo-maildir.el
+++ b/elmo/elmo-maildir.el
@@ -474,27 +474,6 @@ file name for maildir directories."
 	  t)
       (error nil))))
 
-(luna-define-method elmo-folder-search ((folder elmo-maildir-folder)
-					condition &optional numbers)
-  (save-excursion
-    (let* ((msgs (or numbers (elmo-folder-list-messages folder)))
-	   (i 0)
-	   case-fold-search matches
-	   percent num
-	   (len (length msgs))
-	   number-list msg-num)
-      (setq number-list msgs)
-      (dolist (number numbers)
-	(if (elmo-file-field-condition-match
-	     (elmo-message-file-name folder number)
-	     condition number number-list)
-	    (setq matches (cons number matches)))
-	(setq i (1+ i))
-	(elmo-display-progress
-	 'elmo-maildir-search "Searching..."
-	 (/ (* i 100) len)))
-      (nreverse matches))))
-
 (require 'product)
 (product-provide (provide 'elmo-maildir) (require 'elmo-version))
 
diff --git a/elmo/elmo-mark.el b/elmo/elmo-mark.el
index 35352db..02cdde2 100644
--- a/elmo/elmo-mark.el
+++ b/elmo/elmo-mark.el
@@ -164,29 +164,6 @@
 (luna-define-method elmo-folder-writable-p ((folder elmo-mark-folder))
   t)
 
-(luna-define-method elmo-folder-search ((folder elmo-mark-folder)
-					condition &optional from-msgs)
-  (let* ((msgs (or from-msgs (elmo-folder-list-messages folder)))
-	 (number-list msgs)
-	 (i 0)
-	 (num (length msgs))
-	 file
-	 matched
-	 case-fold-search)
-    (while msgs
-      (if (and (setq file (elmo-message-file-name folder (car msgs)))
-	       (file-exists-p file)
-	       (elmo-file-field-condition-match file
-						condition
-						(car msgs)
-						number-list))
-	  (setq matched (nconc matched (list (car msgs)))))
-      (elmo-display-progress
-       'elmo-internal-folder-search "Searching..."
-       (/ (* (setq i (1+ i)) 100) num))
-      (setq msgs (cdr msgs)))
-    matched))
-
 ;;; To override elmo-map-folder methods.
 (luna-define-method elmo-folder-list-unreads-internal
   ((folder elmo-mark-folder) unread-marks &optional mark-alist)
diff --git a/elmo/elmo-msgdb.el b/elmo/elmo-msgdb.el
index a1068dc..87c63d2 100644
--- a/elmo/elmo-msgdb.el
+++ b/elmo/elmo-msgdb.el
@@ -274,77 +274,104 @@ header separator."
    (expand-file-name elmo-msgdb-overview-filename dir)
    overview))
 
-(defun elmo-msgdb-search-internal-primitive (condition entity number-list)
-  (let ((key (elmo-filter-key condition))
-	(case-fold-search t)
-	result)
-    (cond
-     ((string= key "last")
-      (setq result (<= (length (memq
-				(elmo-msgdb-overview-entity-get-number entity)
-				number-list))
-		       (string-to-int (elmo-filter-value condition)))))
-     ((string= key "first")
-      (setq result (< (-
-		       (length number-list)
-		       (length (memq
-				(elmo-msgdb-overview-entity-get-number entity)
-				number-list)))
-		      (string-to-int (elmo-filter-value condition)))))
-     ((string= key "from")
-      (setq result (string-match
-		    (elmo-filter-value condition)
-		    (elmo-msgdb-overview-entity-get-from entity))))
-     ((string= key "subject")
-      (setq result (string-match
-		    (elmo-filter-value condition)
-		    (elmo-msgdb-overview-entity-get-subject entity))))
-     ((string= key "to")
-      (setq result (string-match
-		    (elmo-filter-value condition)
-		    (elmo-msgdb-overview-entity-get-to entity))))
-     ((string= key "cc")
-      (setq result (string-match
-		    (elmo-filter-value condition)
-		    (elmo-msgdb-overview-entity-get-cc entity))))
-     ((or (string= key "since")
-	  (string= key "before"))
-      (let ((field-date (elmo-date-make-sortable-string
-			 (timezone-fix-time
-			  (elmo-msgdb-overview-entity-get-date entity)
-			  (current-time-zone) nil)))
-	    (specified-date
-	     (elmo-date-make-sortable-string
-	      (elmo-date-get-datevec
-	       (elmo-filter-value condition)))))
-	(setq result (if (string= key "since")
-			 (or (string= specified-date field-date)
-			     (string< specified-date field-date))
-		       (string< field-date specified-date)))))
-     ((member key elmo-msgdb-extra-fields)
-      (let ((extval (elmo-msgdb-overview-entity-get-extra-field entity key)))
-	(if (stringp extval)
+(defun elmo-msgdb-match-condition-primitive (condition entity numbers)
+  (catch 'unresolved
+    (let ((key (elmo-filter-key condition))
+	  (case-fold-search t)
+	  result)
+      (cond
+       ((string= key "last")
+	(setq result (<= (length (memq
+				  (elmo-msgdb-overview-entity-get-number
+				   entity)
+				  numbers))
+			 (string-to-int (elmo-filter-value condition)))))
+       ((string= key "first")
+	(setq result (< (-
+			 (length numbers)
+			 (length (memq
+				  (elmo-msgdb-overview-entity-get-number
+				   entity)
+				  numbers)))
+			(string-to-int (elmo-filter-value condition)))))
+       ((string= key "from")
+	(setq result (string-match
+		      (elmo-filter-value condition)
+		      (elmo-msgdb-overview-entity-get-from entity))))
+       ((string= key "subject")
+	(setq result (string-match
+		      (elmo-filter-value condition)
+		      (elmo-msgdb-overview-entity-get-subject entity))))
+       ((string= key "to")
+	(setq result (string-match
+		      (elmo-filter-value condition)
+		      (elmo-msgdb-overview-entity-get-to entity))))
+       ((string= key "cc")
+	(setq result (string-match
+		      (elmo-filter-value condition)
+		      (elmo-msgdb-overview-entity-get-cc entity))))
+       ((or (string= key "since")
+	    (string= key "before"))
+	(let ((field-date (elmo-date-make-sortable-string
+			   (timezone-fix-time
+			    (elmo-msgdb-overview-entity-get-date entity)
+			    (current-time-zone) nil)))
+	      (specified-date
+	       (elmo-date-make-sortable-string
+		(elmo-date-get-datevec
+		 (elmo-filter-value condition)))))
+	  (setq result (if (string= key "since")
+			   (or (string= specified-date field-date)
+			       (string< specified-date field-date))
+			 (string< field-date specified-date)))))
+       ((member key elmo-msgdb-extra-fields)
+	(let ((extval (elmo-msgdb-overview-entity-get-extra-field entity key)))
+	  (when (stringp extval)
 	    (setq result (string-match
 			  (elmo-filter-value condition)
-			  extval))))))
-    (if (eq (elmo-filter-type condition) 'unmatch)
-	(setq result (not result)))
-    result))
-
-(defun elmo-msgdb-search-internal (condition entity number-list)
+			  extval)))))
+       (t
+	(throw 'unresolved condition)))
+      (if (eq (elmo-filter-type condition) 'unmatch)
+	  (not result)
+	result))))
+
+(defun elmo-msgdb-match-condition (condition entity numbers)
   (cond
    ((vectorp condition)
-    (elmo-msgdb-search-internal-primitive condition entity number-list))
+    (elmo-msgdb-match-condition-primitive condition entity numbers))
    ((eq (car condition) 'and)
-    (and (elmo-msgdb-search-internal
-	  (nth 1 condition) entity number-list)
-	 (elmo-msgdb-search-internal
-	  (nth 2 condition) entity number-list)))
+    (let ((lhs (elmo-msgdb-match-condition (nth 1 condition)
+					   entity numbers)))
+      (cond
+       ((elmo-filter-condition-p lhs)
+	(let ((rhs (elmo-msgdb-match-condition (nth 2 condition)
+					       entity numbers)))
+	  (cond ((elmo-filter-condition-p rhs)
+		 (list 'and lhs rhs))
+		(rhs
+		 lhs))))
+       (lhs
+	(elmo-msgdb-match-condition (nth 2 condition)
+				    entity numbers)))))
    ((eq (car condition) 'or)
-    (or (elmo-msgdb-search-internal
-	 (nth 1 condition) entity number-list)
-	(elmo-msgdb-search-internal
-	 (nth 2 condition) entity number-list)))))
+    (let ((lhs (elmo-msgdb-match-condition (nth 1 condition)
+					   entity numbers)))
+      (cond
+       ((elmo-filter-condition-p lhs)
+	(let ((rhs (elmo-msgdb-match-condition (nth 2 condition)
+					       entity numbers)))
+	  (cond ((elmo-filter-condition-p rhs)
+		 (list 'or lhs rhs))
+		(rhs
+		 t)
+		(t
+		 lhs))))
+       (lhs
+	t)
+       (t
+	(elmo-msgdb-match-condition (nth 2 condition)
+				    entity numbers)))))))
 
 (defun elmo-msgdb-delete-msgs (msgdb msgs)
   "Delete MSGS from MSGDB
diff --git a/elmo/elmo-nmz.el b/elmo/elmo-nmz.el
index d603b0d..8bfd7bc 100644
--- a/elmo/elmo-nmz.el
+++ b/elmo/elmo-nmz.el
@@ -254,29 +254,6 @@ If the value is a list, all elements are used as index paths for namazu."
 (luna-define-method elmo-folder-exists-p ((folder elmo-nmz-folder))
   t)
 
-(luna-define-method elmo-folder-search ((folder elmo-nmz-folder)
-					condition &optional from-msgs)
-  (let* ((msgs (or from-msgs (elmo-folder-list-messages folder)))
-	 (orig msgs)
-	 (i 0)
-	 case-fold-search matches
-	 percent num
-	 (num (length msgs)))
-    (while msgs
-      (if (elmo-file-field-condition-match
-	   (elmo-map-message-location folder (car msgs))
-	   condition
-	   (car msgs)
-	   orig)
-	  (setq matches (cons (car msgs) matches)))
-       (setq i (1+ i))
-       (setq percent (/ (* i 100) num))
-       (elmo-display-progress
-	'elmo-nmz-search "Searching..."
-	percent)
-       (setq msgs (cdr msgs)))
-    matches))
-
 ;;; To override elmo-map-folder methods.
 (luna-define-method elmo-folder-list-unreads-internal
   ((folder elmo-nmz-folder) unread-marks &optional mark-alist)
diff --git a/elmo/elmo-nntp.el b/elmo/elmo-nntp.el
index 151ec94..1769323 100644
--- a/elmo/elmo-nntp.el
+++ b/elmo/elmo-nntp.el
@@ -1174,27 +1174,37 @@ Returns a list of cons cells like (NUMBER . VALUE)"
 	    (elmo-list-filter from-msgs result)
 	  result))))))
 
-(luna-define-method elmo-folder-search ((folder elmo-nntp-folder)
-					condition &optional from-msgs)
+(defun elmo-nntp-search-internal (folder condition from-msgs)
   (let (result)
     (cond
      ((vectorp condition)
       (setq result (elmo-nntp-search-primitive
 		    folder condition from-msgs)))
      ((eq (car condition) 'and)
-      (setq result (elmo-folder-search folder (nth 1 condition) from-msgs)
+      (setq result (elmo-nntp-search-internal folder
+					      (nth 1 condition)
+					      from-msgs)
 	    result (elmo-list-filter result
-				     (elmo-folder-search
+				     (elmo-nntp-search-internal
 				      folder (nth 2 condition)
 				      from-msgs))))
      ((eq (car condition) 'or)
-      (setq result (elmo-folder-search folder (nth 1 condition) from-msgs)
+      (setq result (elmo-nntp-search-internal folder
+					      (nth 1 condition)
+					      from-msgs)
 	    result (elmo-uniq-list
 		    (nconc result
-			   (elmo-folder-search folder (nth 2 condition)
-					       from-msgs)))
+			   (elmo-nntp-search-internal folder
+						      (nth 2 condition)
+						      from-msgs)))
 	    result (sort result '<))))))
 
+(luna-define-method elmo-folder-search :around ((folder elmo-nntp-folder)
+						condition &optional from-msgs)
+  (if (elmo-folder-plugged-p folder)
+      (elmo-nntp-search-internal folder condition from-msgs)
+    (luna-call-next-method)))
+
 (defun elmo-nntp-get-folders-info-prepare (folder session-keys)
   (condition-case ()
       (let ((session (elmo-nntp-get-session folder))
diff --git a/elmo/elmo-sendlog.el b/elmo/elmo-sendlog.el
index 87885fb..d0362c7 100644
--- a/elmo/elmo-sendlog.el
+++ b/elmo/elmo-sendlog.el
@@ -155,29 +155,6 @@
     (elmo-folder-set-killed-list-internal folder killed-list))
   t)
 
-(luna-define-method elmo-folder-search ((folder elmo-sendlog-folder)
-					condition &optional from-msgs)
-  (let* ((msgs (or from-msgs (elmo-folder-list-messages folder)))
-	 (number-list msgs)
-	 (i 0)
-	 (num (length msgs))
-	 file
-	 matched
-	 case-fold-search)
-    (while msgs
-      (if (and (setq file (elmo-message-file-name folder (car msgs)))
-	       (file-exists-p file)
-	       (elmo-file-field-condition-match file
-						condition
-						(car msgs)
-						number-list))
-	  (setq matched (nconc matched (list (car msgs)))))
-      (elmo-display-progress
-       'elmo-internal-folder-search "Searching..."
-       (/ (* (setq i (1+ i)) 100) num))
-      (setq msgs (cdr msgs)))
-    matched))
-
 (luna-define-method elmo-message-file-p ((folder elmo-sendlog-folder) number)
   t)
 
diff --git a/elmo/elmo-shimbun.el b/elmo/elmo-shimbun.el
index c11e5e6..2828509 100644
--- a/elmo/elmo-shimbun.el
+++ b/elmo/elmo-shimbun.el
@@ -479,10 +479,6 @@ update overview when message is fetched."
 			  folder))))
     t))
 
-(luna-define-method elmo-folder-search ((folder elmo-shimbun-folder)
-					condition &optional from-msgs)
-  nil)
-
 ;;; To override elmo-map-folder methods.
 (luna-define-method elmo-folder-list-unreads-internal
   ((folder elmo-shimbun-folder) unread-marks &optional mark-alist)
diff --git a/elmo/elmo-util.el b/elmo/elmo-util.el
index fe62464..cbb199c 100644
--- a/elmo/elmo-util.el
+++ b/elmo/elmo-util.el
@@ -793,6 +793,9 @@ Return value is a cons cell of (STRUCTURE . REST)"
 	(setq l1 (cdr l1)))
       (cons diff1 (list l2)))))
 
+(defmacro elmo-filter-condition-p (filter)
+  `(or (vectorp ,filter) (consp ,filter)))
+
 (defmacro elmo-filter-type (filter)
   (` (aref (, filter) 0)))
 
diff --git a/elmo/elmo.el b/elmo/elmo.el
index a0d8cae..932c207 100644
--- a/elmo/elmo.el
+++ b/elmo/elmo.el
@@ -316,10 +316,18 @@ NUMBERS is a list of message numbers to be deleted.")
 (luna-define-generic elmo-folder-search (folder condition &optional numbers)
   "Search and return list of message numbers.
 FOLDER is the ELMO folder structure.
-CONDITION is a condition string for searching.
+CONDITION is a condition structure for searching.
 If optional argument NUMBERS is specified and is a list of message numbers,
 messages are searched from the list.")
 
+(luna-define-generic elmo-message-match-condition (folder number
+							  condition
+							  numbers)
+  "Return non-nil when the message in the FOLDER with NUMBER is matched.
+CONDITION is a condition structure for testing.
+NUMBERS is a list of message numbers,
+use to be test for \"last\" and \"first\" predicates.")
+
 (luna-define-generic elmo-folder-msgdb-create
   (folder numbers new-mark already-mark seen-mark important-mark seen-list)
   "Create a message database (implemented in each backends).
@@ -701,6 +709,77 @@ Return a cons cell of (NUMBER-CROSSPOSTS . NEW-MARK-ALIST).")
     (elmo-folder-send folder 'elmo-folder-rename-internal new-folder)
     (elmo-msgdb-rename-path folder new-folder)))
 
+(luna-define-method elmo-folder-search ((folder elmo-folder)
+					condition
+					&optional numbers)
+  (let ((numbers (or numbers (elmo-folder-list-messages folder))))
+    (or (elmo-folder-search-fast folder condition numbers)
+	(let ((msgdb (elmo-folder-msgdb folder))
+	      (len (length numbers))
+	      matched)
+	  (when (> len elmo-display-progress-threshold)
+	    (elmo-progress-set 'elmo-folder-search len "Searching..."))
+	  (unwind-protect
+	      (dolist (number numbers)
+		(let ((entity (elmo-msgdb-overview-get-entity number msgdb))
+		      result)
+		  (if entity
+		      (setq result (elmo-msgdb-match-condition
+				    condition
+				    entity
+				    numbers))
+		    (setq result condition))
+		  (when (elmo-filter-condition-p result)
+		    (setq result (elmo-message-match-condition
+				  folder
+				  number
+				  condition
+				  numbers)))
+		  (when result
+		    (setq matched (cons number matched))))
+		(elmo-progress-notify 'elmo-folder-search))
+	    (elmo-progress-clear 'elmo-folder-search))
+	  (nreverse matched)))))
+
+(defsubst elmo-folder-search-fast (folder condition numbers)
+  (when (and numbers
+	     (vectorp condition)
+	     (member (elmo-filter-key condition) '("first" "last")))
+    (let ((len (length numbers))
+	  (lastp (string= (elmo-filter-key condition) "last"))
+	  (value (string-to-number (elmo-filter-value condition))))
+      (when (eq (elmo-filter-type condition) 'unmatch)
+	(setq lastp (not lastp)
+	      value  (- len value)))
+      (if lastp
+	  (nthcdr (max (- len value) 0) numbers)
+	(when (> value 0)
+	  (let ((last (nthcdr (1- value) numbers)))
+	    (when last
+	      (setcdr last nil))
+	    numbers))))))
+
+(luna-define-method elmo-message-match-condition ((folder elmo-folder)
+						  number condition
+						  numbers)
+  (let ((filename (cond
+		   ((elmo-message-file-name folder number))
+		   ((let* ((cache (elmo-file-cache-get
+				   (elmo-message-field folder number
+						       'message-id)))
+			   (cache-path (elmo-file-cache-path cache)))
+		      (when (and cache-path
+				 (not (elmo-cache-path-section-p cache-path)))
+			cache-path))))))
+    (when (and filename
+	       (file-readable-p filename))
+      (with-temp-buffer
+	(insert-file-contents-as-binary filename)
+	(elmo-set-buffer-multibyte default-enable-multibyte-characters)
+	;; Should consider charset?
+	(decode-mime-charset-region (point-min) (point-max) elmo-mime-charset)
+	(elmo-buffer-field-condition-match condition number numbers)))))
+
 (luna-define-method elmo-folder-pack-numbers ((folder elmo-folder))
   nil) ; default is noop.
 
@@ -1326,30 +1405,6 @@ If update process is interrupted, return nil."
     (elmo-folder-msgdb folder))))
 
 ;;;
-(defun elmo-msgdb-search (folder condition msgdb)
-  "Search messages which satisfy CONDITION from FOLDER with MSGDB."
-  (let* ((condition (car (elmo-parse-search-condition condition)))
-	 (overview (elmo-msgdb-get-overview msgdb))
-	 (number-alist (elmo-msgdb-get-number-alist msgdb))
-	 (number-list (mapcar 'car number-alist))
-	 (length (length overview))
-	 (i 0)
-	 result)
-    (if (not (elmo-condition-in-msgdb-p condition))
-	(elmo-folder-search folder condition number-list)
-      (while overview
-	(if (elmo-msgdb-search-internal condition (car overview)
-					number-list)
-	    (setq result
-		  (cons
-		   (elmo-msgdb-overview-entity-get-number (car overview))
-		   result)))
-	(setq i (1+ i))
-	(elmo-display-progress
-	 'elmo-msgdb-search "Searching..." (/ (* i 100) length))
-	(setq overview (cdr overview)))
-      (nreverse result))))
-
 (defun elmo-msgdb-load (folder)
   (message "Loading msgdb for %s..." (elmo-folder-name-internal folder))
   (let* ((path (elmo-folder-msgdb-path folder))